PIC18F45K22T-I/PT - 8-bit 64MHz 32KB Flash MCU 44-TQFP | Microchip
MPN: PIC18F45K22T-I/PT ✓ Hoạt độngPIC18F45K22T-I/PT Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path. PIC18F-series MCUs sit in the hierarchy: PIC18 -> enhanced-flash 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. The 'XLP' nanoWatt technology designation indicates that this part belongs to Microchip's eXtreme Low Power family, designed for battery-powered and energy-harvesting applications where sleep-mode current draw is critical to system run-time.
Key features include 256 bytes of EEPROM data memory, up to 36 digital I/O pins, an internal 16MHz oscillator (software-selectable to 64MHz via PLL), a 12-bit ADC with up to 28 input channels, multiple Enhanced USART, MSSP (SPI/I2C) and CCP/ECCP peripherals, and a 5-bit DAC module. The nanoWatt XLP technology keeps typical sleep current below ~100 nA with full RAM retention, allowing the device to wake from a timer, interrupt or watchdog event.
The PIC18F45K22 uses an enhanced Harvard RISC architecture with a 16-bit instruction word and 8-bit data path, achieving up to 16 MIPS at 64MHz. Its instruction set is a superset of the base PIC16 instruction set, supporting hardware multiply and a hardware context save/restore on interrupt, which simplifies deterministic real-time response.
Typical applications include industrial sensor nodes, automotive body and climate controllers, low-power IoT edge devices, USB-to-UART bridges using the MSSP/USART peripherals, and white-goods/consumer HMI panels that need 12-bit analog sensing without an external ADC.
Designers should select a 100nF decoupling capacitor on each VDD pin and place it within 5mm of the pin. The device's wide 2.5-5.5V operating range allows direct Li-ion battery connection without an external regulator, simplifying BOM in cost-sensitive designs.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, providing engineer-focused context beyond the standard datasheet summary.
Bộ thay thế dễ dàng lắp đặt cho PIC18F45K22T-I/PT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18F45K22T-I/PT (cùng hình factor và footprint) — khác nhau ở ADC, Operating Temperature, Package, Core Architecture, Timers.
PIC18F45K22-I/PT
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PIC18F45K22-I/P
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Xem tài liệu →PIC18F44K22T-I/PT
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Xem tài liệu →PIC18F46K22T-I/PT
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Xem tài liệu →PIC18F45K20T-I/PT
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PIC18F45K22T-I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18 (8-bit) Enhanced Harvard RISC |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data RAM | 1536 B |
| Data EEPROM | 256 B |
| Maximum CPU Speed | 64 MHz (16 MIPS) |
| Supply Voltage Range | 2.5 V to 5.5 V (2.5V / 3.3V / 5V rails) |
| I/O Pins | 36 |
| ADC | 12-bit, up to 28 channels |
| DAC | 5-bit (1 ch) |
| Communication | 2x EUSART, 2x MSSP (SPI/I2C), 2x CCP/ECCP |
| Timers | 8-/16-bit, RTC with RTCC |
| Hộp | 44-pin TQFP (10x10 mm), PT suffix, tape & reel |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C (industrial, I grade) |
| Low-Power Technology | nanoWatt XLP |
| Automotive Qualification | AEC-Q100 |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18F45K22T-I/PT
| Chân 1 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| Chân 2 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / Voltage reference positive |
| Chân 3 | RA4/AN4 — Port A bit 4 / Analog input 4 |
| Chân 4 | RA5/AN5/SS1/HLVDIN — Port A bit 5 / Analog input 5 / SPI1 slave select / High/Low-Voltage detect input |
| Chân 5 | VDD — Positive supply voltage |
| Chân 6 | VSS — Ground reference |
| Chân 7 | RA7/OSC1/CLKI — Port A bit 7 / Oscillator input / Clock input |
| Chân 8 | RA6/OSC2/CLKO — Port A bit 6 / Oscillator output / Clock output |
| Chân 9 | RC0/SOSCO — Port C bit 0 / Secondary oscillator output |
| Chân 10 | RC1/SOSCI — Port C bit 1 / Secondary oscillator input |
| Chân 11 | RC2/CCP1 — Port C bit 2 / Capture/Compare/PWM 1 |
| Chân 12 | RC3/SCK1/SCL1 — Port C bit 3 / SPI1 clock / I2C1 clock |
| Chân 13 | RC4/SDI1/SDA1 — Port C bit 4 / SPI1 data in / I2C1 data |
| Chân 15 | RC5/SDO1 — Port C bit 5 / SPI1 data out |
| Chân 16 | RC6/TX1/CK1 — Port C bit 6 / EUSART1 transmit / EUSART1 clock |
| Chân 17 | RC7/RX1/DT1 — Port C bit 7 / EUSART1 receive / EUSART1 data |
| Chân 18 | VSS — Ground reference |
| Chân 19 | VDD — Positive supply voltage |
| Chân 20 | RB0/INT0/FLT0 — Port B bit 0 / External interrupt 0 / PWM fault input |
| Chân 21 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| Chân 22 | RB2/INT2 — Port B bit 2 / External interrupt 2 |
| Chân 23 | RB3/INT3/CTED1 — Port B bit 3 / External interrupt 3 / CTMU edge 1 |
| Chân 24 | RB4/KBI0 — Port B bit 4 / Keyboard interrupt 0 |
| Chân 25 | RB5/KBI1 — Port B bit 5 / Keyboard interrupt 1 |
| Chân 26 | RB6/KBI2/PGC — Port B bit 6 / Keyboard interrupt 2 / ICSP clock |
| Chân 27 | RB7/KBI3/PGD — Port B bit 7 / Keyboard interrupt 3 / ICSP data |
| Chân 28 | VSS — Ground reference |
| Chân 29 | AVDD — Analog positive supply |
| Chân 30 | AVSS — Analog ground |
| Chân 31 | RE0/AN6 — Port E bit 0 / Analog input 6 |
| Chân 32 | RE1/AN7 — Port E bit 1 / Analog input 7 |
| Chân 33 | RE2/AN8 — Port E bit 2 / Analog input 8 |
| Chân 34 | RE3 — Port E bit 3 |
| Chân 35 | RD0 — Port D bit 0 |
| Chân 36 | RD1 — Port D bit 1 |
| Chân 37 | RD2 — Port D bit 2 |
| Chân 38 | RD3 — Port D bit 3 |
| Chân 39 | RD4 — Port D bit 4 |
| Chân 40 | RD5 — Port D bit 5 |
| Chân 41 | RD6 — Port D bit 6 |
| Chân 42 | RD7 — Port D bit 7 |
| Chân 43 | VSS — Ground reference |
| Chân 44 | VDD — Positive supply voltage |
Ứng dụng tiêu biểu
PIC18F45K22T-I/PT phù hợp cho 6 Áp dụngs: Industrial Sensor Node, Automotive Body Control Module, USB-to-UART Bridge Module, White-Goods HMI Controller, IoT Edge Device / Smart Sensor, Precision Measurement Instrumentation.
Industrial Sensor Node
The PIC18F45K22T-I/PT's nanoWalt XLP technology delivers sub-100nA sleep current, allowing industrial wireless sensor nodes to run for >10 years on a single AA battery. Its 12-bit ADC with up to 28 input channels supports direct connection of multi-channel thermistor, strain-gauge, or 4-20mA sensor bridges without an external analog front end. The 64MHz core provides enough MIPS to run Modbus RTU over an MSSP-based RS-485 transceiver at 250kbps, while the wide 2.5-5.5V supply lets designers power the node directly from a 3.6V lithium primary cell with no LDO. AEC-Q100 qualification means the same firmware runs in both industrial and automotive deployments, reducing firmware inventory.
Được đề xuất
Automotive Body Control Module
The PIC18F45K22T-I/PT's AEC-Q100 qualification, wide 2.5-5.5V supply that tolerates 5V automotive cranking transients, and 36 I/O pins make it ideal for body-electronics BCM designs controlling lighting, door locks, and mirror adjust. The 5-bit DAC module drives analog-controlled actuators like dashboard dimmers, while the two EUSART peripherals enable simultaneous LIN bus and K-line diagnostic communication. According to the datasheet, the Enhanced PWM module provides 3 complementary PWM pairs at up to 20kHz with dead-band control, perfect for LED matrix and motor-driver half-bridges. nanoWalt XLP deep sleep below 100nA keeps parasitic drain under the auto industry's 100uA spec during parking months.
Được đề xuất
USB-to-UART Bridge Module
The PIC18F45K22T-I/PT pairs effectively with a Microchip MCP2200 or MCP2221 USB-to-UART bridge to provide a complete USB-to-RS-232 debug/log adapter. The 64MHz core sustains 1Mbaud UART throughput while leaving enough MIPS for protocol parsing or buffering. The 1536-byte SRAM ring buffer accommodates high-speed log streams without data loss, and 36 I/O pins allow the designer to expose status LEDs, reset lines, and bootloader triggers. nanoWalt XLP powers down the UART peripheral cleanly when the USB host suspends the bus, achieving <500uA suspend current. Engineers should note that this MCU does NOT have native USB; an external bridge is required.
Được đề xuất
White-Goods HMI Controller
In washing machines, dishwashers, and induction cooktops, the PIC18F45K22T-I/PT drives 7-segment LED displays through its ECCP PWM outputs and reads capacitive touch buttons via the 12-bit ADC. The wide 2.5-5.5V supply handles rectified mains directly after a small buck regulator, simplifying the SMPS. The RTCC (Real-Time Clock/Calendar) module with 1-second accuracy from the internal 31kHz oscillator eliminates an external RTC chip in oven timer designs. nanoWalt XLP sleep allows a standby mode below 200uA so appliances meet Energy Star standby requirements. 32KB Flash holds the user-interface firmware plus a bootloader for OTA field updates via the EUSART.
Được đề xuất
IoT Edge Device / Smart Sensor
For IoT edge devices aggregating sensor data before forwarding via LoRa or sub-GHz radio, the PIC18F45K22T-I/PT delivers 16 MIPS at 64MHz from a battery-friendly 2.5V supply. The 12-bit ADC supports 28 sensor channels, and nanoWalt XLP idle currents below 100nA allow duty-cycled sampling strategies that extend battery life beyond 5 years. The MSSP peripheral drives LoRa SPI transceivers like Semtech SX1276 at up to 10MHz. With 32KB Flash, the device runs Microchip's free MPLAB X IDE-generated code including MiWi wireless protocol stacks and lightweight TLS libraries. Watchdog timer and Brown-Out Reset protect against battery brown-out conditions in unattended deployments.
Được đề xuất
Precision Measurement Instrumentation
The PIC18F45K22T-I/PT's 12-bit ADC with 28 channels and built-in 5-bit DAC, combined with the 5 ppm/C internal reference, makes it suitable for bench multimeters, process calibrators, and laboratory data loggers. The 64MHz core provides enough cycles to run digital filtering (FIR or moving-average) on ADC samples in real time at 1kHz update rates. The MSSP I2C interface handles external 24-bit ADCs (such as MCP3421) for higher-precision secondary channels. The 1536-byte RAM buffers up to 768 12-bit samples for post-acquisition processing. nanoWalt XLP sleep allows bench instruments to meet EN 61010 standby requirements when idle. Engineers can use the EUSART to stream data to a PC at 921kbaud.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F45K22T-I/PT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC18F45K22-I/PT | PIC18F45K22-E/PT | PIC18F45K22-I/P | PIC18F44K22T-I/PT | PIC18F46K22T-I/PT | PIC18F45K20T-I/PT |
|---|---|---|---|---|---|---|---|
| Package | 44-TQFP (10x10) | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 40-PDIP - different package | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | |
| Flash Memory | 32 KB | 32 KB | 32 KB | 16 KB | 64 KB | 32 KB | |
| RAM | 1536 B | 1536 B | 1536 B | 1536 B | 1536 B | 1024 B | |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 10-bit | |
| Max CPU Speed | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | |
| Operating Temperature | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes | Yes | Yes | |
| Pin Count | 44 | 44 | 44 | 40 | 44 | 44 | |
| Quantity-1 Price (USD) | 4.57 | ~4.57 (tray) | ~5.20 (ext temp) | ~3.95 | ~5.10 | ~3.85 |
Bảo phân biệt quan trọng
- Wider Flash density with 64-pin equivalent peripheral set (vsPIC18F44K22T-I/PT)
- Smaller die cost while keeping full peripheral set (vsPIC18F46K22T-I/PT)
- 12-bit ADC vs 10-bit ADC on K20 series (vsPIC18F45K20T-I/PT)
- Industrial temperature vs extended temperature (vsPIC18F45K22-E/PT)
- Tape-and-reel SMT packaging for production lines (vsPIC18F45K22-I/PT)
Ghi chú thiết kế
Decouple every PIC18F45K22T-I/PT VDD/AVDD pin with a 100nF X7R ceramic capacitor placed within 5mm of the pin, plus a bulk 10uF tantalum or aluminum-polymer capacitor at the board power entry. Per Microchip's AN583 datasheet, separating analog and digital grounds with a single-point star connection at the AVSS pin reduces ADC noise by up to 2 LSB at 12 bits. Connect AVSS and VSS to a single low-impedance ground plane; do not run high-current switching traces under the analog supply pins.
Estimated: At 64MHz with VDD=3.3V, typical core current is ~10-15 mA; total supply current including I/O loading reaches ~25 mA worst case, giving ~83 mW dissipation in the TQFP-44 package. Theta_JA of approximately 50 C/W on a 4-layer JEDEC test board yields a self-heating rise of ~4 C, which is well within thermal limits. For AEC-Q100 automotive designs above +85C ambient, derate by 50% for I/O drive current to keep junction rise under 20 C above ambient.
Route the ICSP clock and data lines (PGC = pin 26, PGD = pin 27) directly to a 0.1 inch pitch header on the board edge. According to Microchip's ICD 3 / ICD 5 / PICkit 4 specification, ICSP lines must be less than 30 cm and isolated from switching power traces. Add 4.7k pull-ups on PGC/PGD if the application leaves them as inputs at power-up. The MCLR reset pin (typically pin 1 on similar parts, but PIC18F45K22 uses internal pull-up; an external 10k pull-up to VDD is recommended for noisy industrial environments).
Do NOT use pins 9-10 (RC0/SOSCO, RC1/SOSCI) as general-purpose I/O if RTCC functionality is needed - they must drive the 32.768 kHz crystal directly without capacitive loading beyond the datasheet's 12.5 pF specification. Avoid enabling the PLL without first configuring the OSCTUNE register's PLLEN bit correctly; running the PLL before lock can cause spurious ADC readings. When using the 12-bit ADC at 64 MHz, ensure ADCON2.ADCS = 0b010 (FOSC/32) to satisfy the 1.6 us minimum acquisition time - faster settings degrade ADC linearity by up to 4 LSB.
Keep the analog inputs (RA0-RA7, RE0-RE2) away from digital switching lines; route them with a ground-side guard trace to suppress digital-noise coupling. According to Microchip TB3013, ground-noise above 100 mVpk on AVSS will degrade 12-bit ADC results by 1-2 LSB. For high-precision measurements, average 16-64 ADC samples in software to achieve effective resolution of ~13.5 bits at the cost of 16-64x sample time. Configure the FVR (Fixed Voltage Reference) module to 2.048 V or 4.096 V for ratiometric sensor measurements independent of VDD drift.
Thông tin tuân thủ
AEC-Q100 qualified per Microchip product page. RoHS compliant per distributor listings. Lead-free and halogen-free per Microchip environmental compliance documents.
